Core Bluetooth: CBPeripheral disconnects unknowingly and not getting any call to didDisconnectPeripheral

Question

I have 3 ViewControllers. 1)Home VC 2) Scan VC 3) Connect VC

Steps: From Home VC, I push to Scan VC for scanning the available BLE Devices.

Scan VC: I have all the BLE Communication code here:

override func viewDidLoad() {
        super.viewDidLoad()

            AppConstants.sharedInstance.centralManager = CBCentralManager(delegate: self, queue: nil) // created global Instance for central Manager and assigned it here
    }

Above will call centralManagerDidUpdateState(_ central: CBCentralManager) Where I am checking all the state for BLUETOOTH. And if,

case .poweredOn:
            btnRefresh.isEnabled = true
            print("central.state is .poweredOn...")

            startScan()
        }

then I Scan for the Devices.

Once I get my device, I connect to it from list of scanned devices,

Then I successfully Connect to that Device it goes to Connect VC.

Till here everything is great.

But real problem starts when

1) I pop from Connect VC to Scan VC and then again Pop to HOMEVC And

2) Then I again push from Home VC to Scan VC

Scan VC: This will call and assign the Delegate to my global CentralManager and as soon as it assign the delegate again, It disconnects the previous connection. (Even I don't get any didDisconnectPeripheral Call)

override func viewDidLoad() {
        super.viewDidLoad()

            AppConstants.sharedInstance.centralManager = CBCentralManager(delegate: self, queue: nil) // Here when I come again it disconnects old connection.
    }

I don't know what's the issue. I am not getting any errors. Please Help...

Answer 1

No Worries. I found my way to workaround. Thanks to @Natrajan for giving me some idea about it.

override func viewDidLoad() {
            super.viewDidLoad()


            if AppConstants.sharedInstance.centralManager == nil{
                AppConstants.sharedInstance.centralManager = CBCentralManager(delegate: self, queue: nil)
            }
            else
            {
                centralManagerDidUpdateState(AppConstants.sharedInstance.centralManager!)
            } 
}

This serves my purpose and I can Check the Bluetooth State and Scan accordingly (Everytime pushing to the Scan VC)

Yuppieee... :)